Question

a rock climber burn 12 calories per minute how many calories Does he burn in one and half an hour

Answer 1

1 and a half hour = 90 minutes

1 minute = 12 calories

90 minutes = ?

90×12
=1080
1080 calories are burnt in 1 and a half hour

Answer 2

heya here is your answer....

there are 90 minutes in one and half hour. ( one hour = 60 minutes; 3/2 × 60 = 90 minutes).
as he burns 12 calorie per minute then in 90 minutes he burns:
90× 12 = 1080 calories.

HOPE IT HELPS..