Question

4.
5.
At a particular time of a day, a 7m high flagstaff casts a shadow which is 8.2m long What is the height of
the building which casts a shadow 20.5 m in length at the same time?
(a) 15.5 m
(b) 16.5 m
(c) 17.5 m
(d) none of these
15 men can build a 16.25m long wall up to a certain height in one day. How many men should be employed
to build a wall of the same height but of length 26m in one day?
(a) 27
(b) 24
(c) 25
(d) none of these
6. In a hospital, the monthly consumption of milk of 60 patients is 1350 litres. How many paticnts can be
accommodated in the hospital if the monthly ration of milk is raised 1710 litres, assuming that the quota per
head remains the same?
(a) 75
(b) 76
(c) 77
(d) none of these
7. The extension in an elastic string varies directly as the weigh hung on it. If a weight of 150 g produces
an extension of 2.8 cm, what weight would produce an extension of 19.6 cm?
(a) 1.5 kg
(b) 1.05 kg
(C) 15 kg (d) none of these
8. A car travels 432 km on 48 litres. How far would it travel on 20 litres of petrol?
(a) 160 km
(b) 180 km
(c) 200 km (d) none of these
9.If 40m of a cloth costs Rs. 1940, how many metres can be bought for Rs. 727.50?
(b) 15 m (b) 16 m (c) 17 m
(d) none of these
9. A private taxi charges a fare of Rs. 260 for a journey of 200 km, how much would it travel for Rs.
279.50?
(a) 200 km
(b) 215 km
(c) 200 km (d) none of these
10. Manoi tynes 540 words during half an hour, how many words would he type in 6 minutes?​

Answer 1

Answer:

5 ) - Given : At a particular time of a day, a 7 high flagstaff castes a shadow which is 8.2 m long.

To find : What is the height of the building which castes a shadow 20.5 meters in length at the same moment?

Solution :

A 7 high flagstaff castes a shadow which is 8.2 m long.

i.e. Shadow of length 8.2 m = 7 m

The shadow of length 1 m =  m

The shadow of length 20.5 m =  m

The shadow of length 20.5 m = 17.5 m

Therefore, The height of the building which caste a shadow 20.5 m in length is 17.5 m.

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