After covering distance of 30 km with a uniform speed there is some defect in a train engine and therefore, its speed
is reduced to 4/5 of its original speed. Consequently, the train reaches its destination late by 45 minutes. Had it
happened after covering 18 kilometers more, the train would have reached 9 minutes earlier. Find the speed of
the train and the distance of journey.
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Answer:
Find the lateral surface area and total surface area of a cuboid of length 80 cm, breadth 40 cm and height 20 cm.
ANSWER
l=80cm,b=40cm,h=20cm
Therefore,
TSA = 2(lb+bh+hl)
=2(80×40+40×20+80×20)=11200 cm²
LSA = 2(l+b)h=2(80+40)20=4800 cm²
I hope this will be help you.
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